Find the median of the data 7, 15, 121, 50, 111, 81, 1, 17, 9, 15, 18.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 17
The median is the middle value after arranging the data in order. For an odd number \(n\) of values, it is the \(\displaystyle\frac{n+1}{2}\)th value.
In ascending order: 1, 7, 9, 15, 15, 17, 18, 50, 81, 111, 121
\(n=11\), so the median is the \(\displaystyle\frac{11+1}{2}=6\)th value
The 6th value is 17
The median is 17.